{"id":3167,"date":"2026-03-27T14:50:24","date_gmt":"2026-03-27T13:50:24","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?page_id=3167"},"modified":"2026-03-27T14:52:35","modified_gmt":"2026-03-27T13:52:35","slug":"blind","status":"publish","type":"page","link":"https:\/\/www.nickelcasting.com\/it\/product-forms\/flanges\/blind\/","title":{"rendered":"Flange cieche"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"3167\" class=\"elementor elementor-3167\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-58f435c e-flex e-con-boxed e-con e-parent\" data-id=\"58f435c\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-94dc55e elementor-widget elementor-widget-html\" data-id=\"94dc55e\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<link rel=\"stylesheet\" href=\"\/zicss\/nickel5.css\">\n\n<div class=\"form-page-wrapper\">\n\n    <div class=\"breadcrumbs\">\n        <a href=\"\/it\/\">Casa<\/a> \n        <span class=\"separator\">\/<\/span> \n        <a href=\"\/it\/product-forms\/\">Forme di prodotto<\/a>\n        <span class=\"separator\">\/<\/span> \n        <a href=\"\/it\/product-forms\/flanges\/\">Flange<\/a>\n        <span class=\"separator\">\/<\/span> \n        Flange cieche\n    <\/div>\n\n    <div class=\"form-hero\">\n        <h1>Flange cieche in lega di nichel<\/h1>\n        \n        <p>\n            Quando \u00e8 necessario terminare in modo sicuro un sistema di tubazioni, chiudere un recipiente in pressione o isolare una linea per una manutenzione critica, le flange cieche (BLRF \/ BLRTJ) sono la salvaguardia definitiva. 28Nickel produce flange cieche forgiate in lega di nichel di qualit\u00e0 superiore, progettate per resistere alle pressioni interne pi\u00f9 estreme e ai fluidi stagnanti altamente corrosivi nei processi chimici, negli ambienti marini offshore e in quelli petroliferi e del gas.\n        <\/p>\n    <\/div>\n\n    <h2 class=\"section-title\">Gradi di lega disponibili per le flange cieche<\/h2>\n    <p>\n        Poich\u00e9 le flange cieche non hanno un foro centrale, assorbono le maggiori sollecitazioni di flessione di qualsiasi altro tipo di flangia. Inoltre, le linee cieche spesso accumulano fluidi stagnanti e corrosivi. La scelta di una superlega ad alta resistenza e resistente al pitting, come la <a href=\"https:\/\/www.nickelcasting.com\/it\/leghe-di-nichel\/leghe-di-nichel-hastelloy\/hastelloy-c-276\/\">Hastelloy C-276<\/a> o Inconel 718, \u00e8 fondamentale per evitare guasti catastrofici.\n    <\/p>\n    \n    <div class=\"available-grades-box\">\n        <h3 style=\"margin-top:0; color: var(--primary-color); font-size: 1.2rem;\">Selezionare un grado per visualizzare le specifiche del materiale:<\/h3>\n        <div class=\"grade-tags-container\">\n            <a href=\"\/it\/leghe-di-nichel\/leghe-di-nichel-inconel\/inconel-625\/\" class=\"grade-tag\">Inconel\u00ae 625 (eccellente resistenza alla vaiolatura)<\/a>\n            <a href=\"\/it\/leghe-di-nichel\/leghe-di-nichel-inconel\/inconel-718\/\" class=\"grade-tag\">Inconel\u00ae 718 (alta resistenza allo snervamento\/pressione)<\/a>\n            \n            <a href=\"\/it\/leghe-di-nichel\/monel-metal-alloys\/monel-400\/\" class=\"grade-tag\">Monel\u00ae 400 (acido HF e acqua di mare)<\/a>\n            <a href=\"\/it\/leghe-di-nichel\/monel-metal-alloys\/monel-k500\/\" class=\"grade-tag\">Monel\u00ae K-500 (marina\/gas acido)<\/a>\n            \n            <a href=\"\/it\/leghe-di-nichel\/hastelloy-alloys\/hastelloy-c276\/\" class=\"grade-tag\">Hastelloy\u00ae C-276 (trattamento chimico severo)<\/a>\n            <a href=\"\/it\/leghe-di-nichel\/waspaloy\/\" class=\"grade-tag\">Waspaloy\u00ae (scarichi ad altissima temperatura)<\/a>\n        <\/div>\n    <\/div>\n\n    <h2 class=\"section-title\">Caratteristiche tecniche e variazioni<\/h2>\n    <p style=\"margin-bottom: 25px;\">\n        Oltre alle flange di tranciatura solide standard, offriamo configurazioni cieche specializzate per il collaudo delle condutture, la strumentazione e la manutenzione ordinaria.\n    <\/p>\n    \n    <div class=\"forms-grid\">\n        \n        <div class=\"form-card\">\n            <div class=\"form-card-header\">\n                <div class=\"form-icon\">\ud83d\uded1<\/div>\n                <h3>Flange cieche standard<\/h3>\n            <\/div>\n            <p>Dischi forgiati solidi utilizzati per sigillare le estremit\u00e0 dei sistemi di tubazioni o le aperture dei recipienti in pressione. Vengono avvitati contro una flangia di accoppiamento (tipicamente un collo di saldatura o slip-on) per creare una tenuta altamente sicura e a pressione.<\/p>\n        <\/div>\n\n        <div class=\"form-card\">\n            <div class=\"form-card-header\">\n                <div class=\"form-icon\">\ud83d\udc53<\/div>\n                <h3>Tende per occhiali (Figura 8)<\/h3>\n            <\/div>\n            <p>Dispositivo di sicurezza specializzato caratterizzato da una piastra solida (per oscurare la linea) e da una piastra ad anello (per consentire il flusso) collegate da un nastro. Viene utilizzato nei sistemi che richiedono un isolamento frequente e assoluto per la manutenzione.<\/p>\n        <\/div>\n\n        <div class=\"form-card\">\n            <div class=\"form-card-header\">\n                <div class=\"form-icon\">\ud83d\udeb0<\/div>\n                <h3>Flange cieche filettate<\/h3>\n            <\/div>\n            <p>Flange cieche standard lavorate con precisione a CNC con un foro centrale filettato (NPT). Sono essenziali per l'installazione di manometri, valvole di sfiato o linee di drenaggio alla fine di un percorso di tubi.<\/p>\n        <\/div>\n\n        <div class=\"form-card\">\n            <div class=\"form-card-header\">\n                <div class=\"form-icon\">\u2699\ufe0f<\/div>\n                <h3>Resistenza alle pressioni estreme<\/h3>\n            <\/div>\n            <p>Grazie alla mancanza di un'apertura centrale, le flange cieche sono strutturalmente il tipo di flangia pi\u00f9 resistente. Quando vengono forgiate da leghe ad alto rendimento come <a href=\"https:\/\/www.nickelcasting.com\/it\/leghe-di-nichel\/leghe-di-nichel-inconel\/inconel-718\/\">Inconel 718<\/a>, Possono gestire senza problemi prove di pressione idrostatica e servizio continuo ad alta pressione.<\/p>\n        <\/div>\n\n    <\/div>\n\n    <div class=\"section-title\">Specifiche e dimensioni standard<\/div>\n    <div class=\"data-table-wrap\">\n        <table class=\"tech-table\">\n            <thead>\n                <tr>\n                    <th width=\"30%\">Categoria di specifiche<\/th>\n                    <th width=\"70%\">Dettagli e standard<\/th>\n                <\/tr>\n            <\/thead>\n            <tbody>\n                <tr>\n                    <td><strong>Standard dimensionali<\/strong><\/td>\n                    <td>ASME \/ ANSI B16.5 (fino a 24\"), ASME B16.47 Serie A e B (grande diametro &gt; 24\")<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Classi di pressione<\/strong><\/td>\n                    <td>150#, 300#, 600#, 900#, 1500#, 2500# (<a href=\"https:\/\/www.nickelcasting.com\/it\/leghe-di-nichel\/colata-di-nichel\/personalizzato\/\">Personalizzato<\/a> spessori ad alta pressione disponibili)<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Dimensione del foro<\/strong><\/td>\n                    <td>Nessuno (disco pieno). *A meno che non sia specificato come flangia cieca filettata con filettatura NPT.<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Rivestimento della flangia<\/strong><\/td>\n                    <td>Faccia rialzata (BLRF), faccia piana (BLFF), giunto ad anello (BLRTJ) per una massima tenuta.<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Processo di produzione<\/strong><\/td>\n                    <td>Forgiato a caldo e lavorato a CNC di precisione. Mai fuso.<\/td>\n                <\/tr>\n            <\/tbody>\n        <\/table>\n    <\/div>\n\n    <div class=\"cta-block\">\n        <h3>Avete bisogno di bloccare una linea in modo sicuro?<\/h3>\n        <p>Quando si richiede un preventivo, specificare il grado di lega (ad esempio, Hastelloy C-276), la dimensione nominale del tubo (NPS), la classe di pressione (ad esempio, 900#) e il rivestimento della flangia (ad esempio, RTJ). Se si necessita di un cieco filettato, si prega di fornire la dimensione della filettatura NPT richiesta.<\/p>\n        <a href=\"\/it\/contact\/\" class=\"quote-btn\">Richiedete un preventivo per una flangia cieca<\/a>\n    <\/div>\n\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Home \/ Product Forms \/ Flanges \/ Blind Flanges Nickel Alloy Blind Flanges When you need to securely terminate a piping system, blank off a pressure vessel, or isolate a line for critical maintenance, Blind Flanges (BLRF \/ BLRTJ) are the ultimate safeguard. 28Nickel manufactures premium forged nickel alloy blind flanges engineered to withstand the [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"parent":3145,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"full-width-container","site-content-style":"unboxed","site-sidebar-style":"unboxed","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-3167","page","type-page","status-publish","hentry"],"spectra_custom_meta":{"_edit_lock":["1774619451:1"],"_edit_last":["1"],"_elementor_edit_mode":["builder"],"_astra_content_layout_flag":["disabled"],"ast-title-bar-display":["disabled"],"ast-featured-img":["disabled"],"site-content-layout":["page-builder"],"ast-site-content-layout":["full-width-container"],"site-sidebar-layout":["no-sidebar"],"_elementor_template_type":["wp-page"],"_elementor_version":["3.33.2"],"_elementor_pro_version":["3.32.3"],"rank_math_seo_score":["70"],"rank_math_internal_links_processed":["1"],"_wp_page_template":["default"],"_elementor_data":["[{\"id\":\"58f435c\",\"elType\":\"container\",\"settings\":{\"display_condition_list\":[{\"display_condition_login_status\":\"subscriber\",\"_id\":\"3a3bb3e\"}]},\"elements\":[{\"id\":\"94dc55e\",\"elType\":\"widget\",\"settings\":{\"html\":\"<link rel=\\\"stylesheet\\\" href=\\\"\\\/zicss\\\/nickel5.css\\\">\\n\\n<div class=\\\"form-page-wrapper\\\">\\n\\n    <div class=\\\"breadcrumbs\\\">\\n        <a href=\\\"\\\/\\\">Home<\\\/a> \\n        <span class=\\\"separator\\\">\\\/<\\\/span> \\n        <a href=\\\"\\\/product-forms\\\/\\\">Product Forms<\\\/a>\\n        <span class=\\\"separator\\\">\\\/<\\\/span> \\n        <a href=\\\"\\\/product-forms\\\/flanges\\\/\\\">Flanges<\\\/a>\\n        <span class=\\\"separator\\\">\\\/<\\\/span> \\n        Blind Flanges\\n    <\\\/div>\\n\\n    <div class=\\\"form-hero\\\">\\n        <h1>Nickel Alloy Blind Flanges<\\\/h1>\\n        \\n        <p>\\n            When you need to securely terminate a piping system, blank off a pressure vessel, or isolate a line for critical maintenance, Blind Flanges (BLRF \\\/ BLRTJ) are the ultimate safeguard. 28Nickel manufactures premium forged nickel alloy blind flanges engineered to withstand the most extreme internal pressures and highly corrosive stagnant media in chemical processing, offshore marine, and oil & gas environments.\\n        <\\\/p>\\n    <\\\/div>\\n\\n    <h2 class=\\\"section-title\\\">Available Alloy Grades for Blind Flanges<\\\/h2>\\n    <p>\\n        Because blind flanges lack a center bore, they absorb the highest bending stress of any flange type. Furthermore, dead-end lines often accumulate stagnant, corrosive fluids. Selecting a high-strength, pitting-resistant superalloy\\u2014such as Hastelloy C-276 or Inconel 718\\u2014is critical to preventing catastrophic failure.\\n    <\\\/p>\\n    \\n    <div class=\\\"available-grades-box\\\">\\n        <h3 style=\\\"margin-top:0; color: var(--primary-color); font-size: 1.2rem;\\\">Select a Grade to View Material Specs:<\\\/h3>\\n        <div class=\\\"grade-tags-container\\\">\\n            <a href=\\\"\\\/nickel-alloys\\\/inconel-nickel-alloys\\\/inconel-625\\\/\\\" class=\\\"grade-tag\\\">Inconel\\u00ae 625 (Excellent Pitting Resistance)<\\\/a>\\n            <a href=\\\"\\\/nickel-alloys\\\/inconel-nickel-alloys\\\/inconel-718\\\/\\\" class=\\\"grade-tag\\\">Inconel\\u00ae 718 (High Yield Strength\\\/Pressure)<\\\/a>\\n            \\n            <a href=\\\"\\\/nickel-alloys\\\/monel-metal-alloys\\\/monel-400\\\/\\\" class=\\\"grade-tag\\\">Monel\\u00ae 400 (HF Acid & Seawater)<\\\/a>\\n            <a href=\\\"\\\/nickel-alloys\\\/monel-metal-alloys\\\/monel-k500\\\/\\\" class=\\\"grade-tag\\\">Monel\\u00ae K-500 (Marine\\\/Sour Gas)<\\\/a>\\n            \\n            <a href=\\\"\\\/nickel-alloys\\\/hastelloy-alloys\\\/hastelloy-c276\\\/\\\" class=\\\"grade-tag\\\">Hastelloy\\u00ae C-276 (Severe Chemical Processing)<\\\/a>\\n            <a href=\\\"\\\/nickel-alloys\\\/waspaloy\\\/\\\" class=\\\"grade-tag\\\">Waspaloy\\u00ae (Extreme High Temp Exhausts)<\\\/a>\\n        <\\\/div>\\n    <\\\/div>\\n\\n    <h2 class=\\\"section-title\\\">Engineering Features & Variations<\\\/h2>\\n    <p style=\\\"margin-bottom: 25px;\\\">\\n        Beyond standard solid blanking flanges, we provide specialized blind configurations tailored for pipeline testing, instrumentation, and routine maintenance.\\n    <\\\/p>\\n    \\n    <div class=\\\"forms-grid\\\">\\n        \\n        <div class=\\\"form-card\\\">\\n            <div class=\\\"form-card-header\\\">\\n                <div class=\\\"form-icon\\\">\\ud83d\\uded1<\\\/div>\\n                <h3>Standard Blind Flanges<\\\/h3>\\n            <\\\/div>\\n            <p>Solid forged disks used to seal the ends of piping systems or pressure vessel openings. They are bolted against a mating flange (typically a weld neck or slip-on) to create a highly secure, pressure-tight seal.<\\\/p>\\n        <\\\/div>\\n\\n        <div class=\\\"form-card\\\">\\n            <div class=\\\"form-card-header\\\">\\n                <div class=\\\"form-icon\\\">\\ud83d\\udc53<\\\/div>\\n                <h3>Spectacle Blinds (Figure-8)<\\\/h3>\\n            <\\\/div>\\n            <p>A specialized safety device featuring a solid plate (to blind the line) and a ring plate (to allow flow) connected by a web. Used in systems requiring frequent, absolute isolation for maintenance.<\\\/p>\\n        <\\\/div>\\n\\n        <div class=\\\"form-card\\\">\\n            <div class=\\\"form-card-header\\\">\\n                <div class=\\\"form-icon\\\">\\ud83d\\udeb0<\\\/div>\\n                <h3>Tapped Blind Flanges<\\\/h3>\\n            <\\\/div>\\n            <p>Standard blind flanges that have been precision CNC-machined with a threaded center hole (NPT). These are essential for installing pressure gauges, bleed valves, or drainage lines at the end of a pipe run.<\\\/p>\\n        <\\\/div>\\n\\n        <div class=\\\"form-card\\\">\\n            <div class=\\\"form-card-header\\\">\\n                <div class=\\\"form-icon\\\">\\u2699\\ufe0f<\\\/div>\\n                <h3>Extreme Pressure Resistance<\\\/h3>\\n            <\\\/div>\\n            <p>Due to the lack of a center opening, blind flanges are structurally the strongest flange type. When forged from high-yield alloys like Inconel 718, they can easily manage severe hydrostatic pressure testing and continuous high-pressure service.<\\\/p>\\n        <\\\/div>\\n\\n    <\\\/div>\\n\\n    <div class=\\\"section-title\\\">Standard Specifications & Dimensions<\\\/div>\\n    <div class=\\\"data-table-wrap\\\">\\n        <table class=\\\"tech-table\\\">\\n            <thead>\\n                <tr>\\n                    <th width=\\\"30%\\\">Specification Category<\\\/th>\\n                    <th width=\\\"70%\\\">Details & Standards<\\\/th>\\n                <\\\/tr>\\n            <\\\/thead>\\n            <tbody>\\n                <tr>\\n                    <td><strong>Dimensional Standards<\\\/strong><\\\/td>\\n                    <td>ASME \\\/ ANSI B16.5 (Up to 24\\\"), ASME B16.47 Series A & B (Large Diameter > 24\\\")<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Pressure Classes<\\\/strong><\\\/td>\\n                    <td>150#, 300#, 600#, 900#, 1500#, 2500# (Custom high-pressure thicknesses available)<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Bore Size<\\\/strong><\\\/td>\\n                    <td>None (Solid disk). *Unless specified as a Tapped Blind Flange with NPT threading.<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Flange Facing<\\\/strong><\\\/td>\\n                    <td>Raised Face (BLRF), Flat Face (BLFF), Ring Type Joint (BLRTJ) for max sealing.<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Manufacturing Process<\\\/strong><\\\/td>\\n                    <td>Hot Forged and Precision CNC Machined. Never cast.<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n    <\\\/div>\\n\\n    <div class=\\\"cta-block\\\">\\n        <h3>Need to Securely Blind a Line?<\\\/h3>\\n        <p>When requesting a quote, please specify the alloy grade (e.g., Hastelloy C-276), nominal pipe size (NPS), pressure class (e.g., 900#), and flange facing (e.g., RTJ). If you need a tapped blind, please provide the required NPT thread size.<\\\/p>\\n        <a href=\\\"\\\/contact\\\/\\\" class=\\\"quote-btn\\\">Get a Blind Flange Quote<\\\/a>\\n    <\\\/div>\\n\\n<\\\/div>\",\"display_condition_list\":[{\"display_condition_login_status\":\"subscriber\",\"_id\":\"821f165\"}]},\"elements\":[],\"widgetType\":\"html\"}],\"isInner\":false}]"],"_elementor_page_settings":["a:0:{}"],"_elementor_controls_usage":["a:2:{s:4:\"html\";a:3:{s:5:\"count\";i:1;s:15:\"control_percent\";i:0;s:8:\"controls\";a:2:{s:7:\"content\";a:1:{s:13:\"section_title\";a:1:{s:4:\"html\";i:1;}}s:8:\"advanced\";a:1:{s:26:\"display_conditions_section\";a:1:{s:22:\"display_condition_list\";i:1;}}}}s:9:\"container\";a:3:{s:5:\"count\";i:1;s:15:\"control_percent\";i:0;s:8:\"controls\";a:1:{s:8:\"advanced\";a:1:{s:26:\"display_conditions_section\";a:1:{s:22:\"display_condition_list\";i:1;}}}}}"],"rank_math_focus_keyword":["blind flanges"],"rank_math_description":["Nickel alloy blind flanges in Inconel, Monel, Hastelloy and Waspaloy for high-pressure, corrosive chemical, marine and oil gas systems."],"ilj_blacklistdefinition":["a:0:{}"],"ilj_linkdefinition":["a:1:{i:0;s:13:\"blind flanges\";}"],"site-content-style":["unboxed"],"site-sidebar-style":["unboxed"],"theme-transparent-header-meta":["default"],"astra-migrate-meta-layouts":["set"],"_uag_page_assets":["a:9:{s:3:\"css\";s:263:\".uag-blocks-common-selector{z-index:var(--z-index-desktop) !important}@media (max-width: 976px){.uag-blocks-common-selector{z-index:var(--z-index-tablet) !important}}@media (max-width: 767px){.uag-blocks-common-selector{z-index:var(--z-index-mobile) !important}}\n\";s:2:\"js\";s:0:\"\";s:18:\"current_block_list\";a:8:{i:0;s:11:\"core\/search\";i:1;s:10:\"core\/group\";i:2;s:12:\"core\/heading\";i:3;s:17:\"core\/latest-posts\";i:4;s:20:\"core\/latest-comments\";i:5;s:13:\"core\/archives\";i:6;s:15:\"core\/categories\";i:7;s:10:\"core\/image\";}s:8:\"uag_flag\";b:0;s:11:\"uag_version\";s:10:\"1779372270\";s:6:\"gfonts\";a:0:{}s:10:\"gfonts_url\";s:0:\"\";s:12:\"gfonts_files\";a:0:{}s:14:\"uag_faq_layout\";b:0;}"],"_uag_css_file_name":["uag-css-3167.css"],"_elementor_page_assets":["a:1:{s:7:\"scripts\";a:1:{i:0;s:18:\"elementor-frontend\";}}"],"_elementor_css":["a:6:{s:4:\"time\";i:1779909659;s:5:\"fonts\";a:0:{}s:5:\"icons\";a:0:{}s:20:\"dynamic_elements_ids\";a:0:{}s:6:\"status\";s:4:\"file\";i:0;s:0:\"\";}"],"_elementor_element_cache":["{\"timeout\":1779999659,\"value\":{\"content\":\"<div class=\\\"elementor-element elementor-element-58f435c e-flex e-con-boxed e-con e-parent\\\" data-id=\\\"58f435c\\\" data-element_type=\\\"container\\\">\\n\\t\\t\\t\\t\\t<div class=\\\"e-con-inner\\\">\\n\\t\\t\\t\\t<div class=\\\"elementor-element elementor-element-94dc55e elementor-widget elementor-widget-html\\\" data-id=\\\"94dc55e\\\" data-element_type=\\\"widget\\\" data-widget_type=\\\"html.default\\\">\\n\\t\\t\\t\\t<div class=\\\"elementor-widget-container\\\">\\n\\t\\t\\t\\t\\t<link rel=\\\"stylesheet\\\" href=\\\"\\\/zicss\\\/nickel5.css\\\">\\n\\n<div class=\\\"form-page-wrapper\\\">\\n\\n    <div class=\\\"breadcrumbs\\\">\\n        <a href=\\\"\\\/\\\">Home<\\\/a> \\n        <span class=\\\"separator\\\">\\\/<\\\/span> \\n        <a href=\\\"\\\/product-forms\\\/\\\">Product Forms<\\\/a>\\n        <span class=\\\"separator\\\">\\\/<\\\/span> \\n        <a href=\\\"\\\/product-forms\\\/flanges\\\/\\\">Flanges<\\\/a>\\n        <span class=\\\"separator\\\">\\\/<\\\/span> \\n        Blind Flanges\\n    <\\\/div>\\n\\n    <div class=\\\"form-hero\\\">\\n        <h1>Nickel Alloy Blind Flanges<\\\/h1>\\n        \\n        <p>\\n            When you need to securely terminate a piping system, blank off a pressure vessel, or isolate a line for critical maintenance, Blind Flanges (BLRF \\\/ BLRTJ) are the ultimate safeguard. 28Nickel manufactures premium forged nickel alloy blind flanges engineered to withstand the most extreme internal pressures and highly corrosive stagnant media in chemical processing, offshore marine, and oil & gas environments.\\n        <\\\/p>\\n    <\\\/div>\\n\\n    <h2 class=\\\"section-title\\\">Available Alloy Grades for Blind Flanges<\\\/h2>\\n    <p>\\n        Because blind flanges lack a center bore, they absorb the highest bending stress of any flange type. Furthermore, dead-end lines often accumulate stagnant, corrosive fluids. Selecting a high-strength, pitting-resistant superalloy\\u2014such as Hastelloy C-276 or Inconel 718\\u2014is critical to preventing catastrophic failure.\\n    <\\\/p>\\n    \\n    <div class=\\\"available-grades-box\\\">\\n        <h3 style=\\\"margin-top:0; color: var(--primary-color); font-size: 1.2rem;\\\">Select a Grade to View Material Specs:<\\\/h3>\\n        <div class=\\\"grade-tags-container\\\">\\n            <a href=\\\"\\\/nickel-alloys\\\/inconel-nickel-alloys\\\/inconel-625\\\/\\\" class=\\\"grade-tag\\\">Inconel\\u00ae 625 (Excellent Pitting Resistance)<\\\/a>\\n            <a href=\\\"\\\/nickel-alloys\\\/inconel-nickel-alloys\\\/inconel-718\\\/\\\" class=\\\"grade-tag\\\">Inconel\\u00ae 718 (High Yield Strength\\\/Pressure)<\\\/a>\\n            \\n            <a href=\\\"\\\/nickel-alloys\\\/monel-metal-alloys\\\/monel-400\\\/\\\" class=\\\"grade-tag\\\">Monel\\u00ae 400 (HF Acid & Seawater)<\\\/a>\\n            <a href=\\\"\\\/nickel-alloys\\\/monel-metal-alloys\\\/monel-k500\\\/\\\" class=\\\"grade-tag\\\">Monel\\u00ae K-500 (Marine\\\/Sour Gas)<\\\/a>\\n            \\n            <a href=\\\"\\\/nickel-alloys\\\/hastelloy-alloys\\\/hastelloy-c276\\\/\\\" class=\\\"grade-tag\\\">Hastelloy\\u00ae C-276 (Severe Chemical Processing)<\\\/a>\\n            <a href=\\\"\\\/nickel-alloys\\\/waspaloy\\\/\\\" class=\\\"grade-tag\\\">Waspaloy\\u00ae (Extreme High Temp Exhausts)<\\\/a>\\n        <\\\/div>\\n    <\\\/div>\\n\\n    <h2 class=\\\"section-title\\\">Engineering Features & Variations<\\\/h2>\\n    <p style=\\\"margin-bottom: 25px;\\\">\\n        Beyond standard solid blanking flanges, we provide specialized blind configurations tailored for pipeline testing, instrumentation, and routine maintenance.\\n    <\\\/p>\\n    \\n    <div class=\\\"forms-grid\\\">\\n        \\n        <div class=\\\"form-card\\\">\\n            <div class=\\\"form-card-header\\\">\\n                <div class=\\\"form-icon\\\">\\ud83d\\uded1<\\\/div>\\n                <h3>Standard Blind Flanges<\\\/h3>\\n            <\\\/div>\\n            <p>Solid forged disks used to seal the ends of piping systems or pressure vessel openings. They are bolted against a mating flange (typically a weld neck or slip-on) to create a highly secure, pressure-tight seal.<\\\/p>\\n        <\\\/div>\\n\\n        <div class=\\\"form-card\\\">\\n            <div class=\\\"form-card-header\\\">\\n                <div class=\\\"form-icon\\\">\\ud83d\\udc53<\\\/div>\\n                <h3>Spectacle Blinds (Figure-8)<\\\/h3>\\n            <\\\/div>\\n            <p>A specialized safety device featuring a solid plate (to blind the line) and a ring plate (to allow flow) connected by a web. Used in systems requiring frequent, absolute isolation for maintenance.<\\\/p>\\n        <\\\/div>\\n\\n        <div class=\\\"form-card\\\">\\n            <div class=\\\"form-card-header\\\">\\n                <div class=\\\"form-icon\\\">\\ud83d\\udeb0<\\\/div>\\n                <h3>Tapped Blind Flanges<\\\/h3>\\n            <\\\/div>\\n            <p>Standard blind flanges that have been precision CNC-machined with a threaded center hole (NPT). These are essential for installing pressure gauges, bleed valves, or drainage lines at the end of a pipe run.<\\\/p>\\n        <\\\/div>\\n\\n        <div class=\\\"form-card\\\">\\n            <div class=\\\"form-card-header\\\">\\n                <div class=\\\"form-icon\\\">\\u2699\\ufe0f<\\\/div>\\n                <h3>Extreme Pressure Resistance<\\\/h3>\\n            <\\\/div>\\n            <p>Due to the lack of a center opening, blind flanges are structurally the strongest flange type. When forged from high-yield alloys like Inconel 718, they can easily manage severe hydrostatic pressure testing and continuous high-pressure service.<\\\/p>\\n        <\\\/div>\\n\\n    <\\\/div>\\n\\n    <div class=\\\"section-title\\\">Standard Specifications & Dimensions<\\\/div>\\n    <div class=\\\"data-table-wrap\\\">\\n        <table class=\\\"tech-table\\\">\\n            <thead>\\n                <tr>\\n                    <th width=\\\"30%\\\">Specification Category<\\\/th>\\n                    <th width=\\\"70%\\\">Details & Standards<\\\/th>\\n                <\\\/tr>\\n            <\\\/thead>\\n            <tbody>\\n                <tr>\\n                    <td><strong>Dimensional Standards<\\\/strong><\\\/td>\\n                    <td>ASME \\\/ ANSI B16.5 (Up to 24\\\"), ASME B16.47 Series A & B (Large Diameter > 24\\\")<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Pressure Classes<\\\/strong><\\\/td>\\n                    <td>150#, 300#, 600#, 900#, 1500#, 2500# (Custom high-pressure thicknesses available)<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Bore Size<\\\/strong><\\\/td>\\n                    <td>None (Solid disk). *Unless specified as a Tapped Blind Flange with NPT threading.<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Flange Facing<\\\/strong><\\\/td>\\n                    <td>Raised Face (BLRF), Flat Face (BLFF), Ring Type Joint (BLRTJ) for max sealing.<\\\/td>\\n                <\\\/tr>\\n                <tr>\\n                    <td><strong>Manufacturing Process<\\\/strong><\\\/td>\\n                    <td>Hot Forged and Precision CNC Machined. Never cast.<\\\/td>\\n                <\\\/tr>\\n            <\\\/tbody>\\n        <\\\/table>\\n    <\\\/div>\\n\\n    <div class=\\\"cta-block\\\">\\n        <h3>Need to Securely Blind a Line?<\\\/h3>\\n        <p>When requesting a quote, please specify the alloy grade (e.g., Hastelloy C-276), nominal pipe size (NPS), pressure class (e.g., 900#), and flange facing (e.g., RTJ). If you need a tapped blind, please provide the required NPT thread size.<\\\/p>\\n        <a href=\\\"\\\/contact\\\/\\\" class=\\\"quote-btn\\\">Get a Blind Flange Quote<\\\/a>\\n    <\\\/div>\\n\\n<\\\/div>\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\",\"scripts\":[],\"styles\":[]}}"]},"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"nickel","author_link":"https:\/\/www.nickelcasting.com\/it\/author\/nickel\/"},"uagb_comment_info":0,"uagb_excerpt":"Home \/ Product Forms \/ Flanges \/ Blind Flanges Nickel Alloy Blind Flanges When you need to securely terminate a piping system, blank off a pressure vessel, or isolate a line for critical maintenance, Blind Flanges (BLRF \/ BLRTJ) are the ultimate safeguard. 28Nickel manufactures premium forged nickel alloy blind flanges engineered to withstand the&hellip;","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/pages\/3167","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/comments?post=3167"}],"version-history":[{"count":4,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/pages\/3167\/revisions"}],"predecessor-version":[{"id":3173,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/pages\/3167\/revisions\/3173"}],"up":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/pages\/3145"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/media?parent=3167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}